Spectroscopic properties of Tm³⁺/Er³⁺/Yb³⁺ co-doped oxyfluorogermanate glasses containing silver nanoparticles

详细信息    查看全文

• 作者：Yuebo Hu ; Jianbei Qiu ; Zhiguo Song ; Zhengwen Yang ; Yong Yang ; Dacheng Zhou ; Qing Jiao ; Chenshuo Ma
• 关键词：Up-conversion luminescence ; Spectroscopic properties ; Oxyfluorogermanate glasses ; Silver nanoparticles ; Local surface plasmons ; Energy transfer
• 刊名：Journal of Luminescence
• 出版年：January, 2014
• 年：2014
• 卷：145
• 期：Complete
• 页码：512-517
• 全文大小：830 K

文摘

Tm³⁺/Er³⁺/Yb³⁺ co-doped oxyfluorogermanate glasses containing silver nanoparticles (NPs) are prepared using the conventional melt-quenching technique. Detailed structure and optical characterizations have been carried out. The observed localized surface plasmon resonance (SPR) band is evidenced to be around 440 nm. Four frequency up-conversion (UC) emission bands blue (476 nm), green (524 and 546 nm) and red (658 nm) corresponding to ¹G₄鈫?sup>3H₆ (Tm³⁺), (²H_11/2, ⁴S_3/2) 鈫?sup>4I_15/2 (Er³⁺) and ⁴F_9/2鈫?sup>4I_15/2 (Er³⁺) transitions, respectively, were simultaneously observed under 980 nm excitation at room temperature. It is confirmed that the anneal duration plays an important role in increasing the UC luminescence intension, however, further increase in the annealing time reduces the intensity. The enhancement in UC emission intensity is mainly attributed to the large local electric field induced by the silver NPs. The quenching in the luminescence intensity is due to the energy transfer from Tm³⁺, Er³⁺ and Yb³⁺ ions to silver NPs. Furthermore, the results suggest that the embedded silver NPs may adjust the UC luminescence color in the studied emission system.